iphone - uitableview 区分大小写的部分

Question

我想知道如何让不同的大小写字母进入相同的部分...

我将我解析的数据传递给一个自定义方法，该方法采用数组并创建如下所示的部分字母。我只是不确定如何做到这一点，以便大写字母和非大写字母出现在相同的部分中，并且希望得到一些帮助。

//method to sort array and split for use with uitableview Index
- (IBAction)startSortingTheArray:(NSArray *)arrayData
{
     //If you want the standard array use this code
    sortedArray = arrayData;

    self.letterDictionary = [NSMutableDictionary dictionary];
    sectionLetterArray = [[NSMutableArray alloc] init];

    //Index scrolling Iterate over values for future use
    for (NSString *value in sortedArray) 
    {
        // Get the first letter and its associated array from the dictionary.
        // If the dictionary does not exist create one and associate it with the letter.
        NSString *firstLetter = [value substringWithRange:NSMakeRange(0, 1)];

        NSMutableArray *arrayForLetter = [letterDictionary objectForKey:firstLetter];
        if (arrayForLetter == nil) 
        {
            arrayForLetter = [NSMutableArray array];
            [letterDictionary setObject:arrayForLetter forKey:firstLetter];
            [sectionLetterArray addObject:firstLetter]; // This will be used to set index scroller and section titles
        }
        // Add the value to the array for this letter
        [arrayForLetter addObject:value];
    }      
    //Reload data in table
    [self.tableView reloadData];
}

这是自动取款机的样子..

Answer 1

最简单的解决方案是始终只存储首字母的大写(或小写)版本。所以你可以这样做:

        NSString *firstLetter = [[value substringWithRange:NSMakeRange(0, 1)] uppercaseString];